IGCSE Sciences - Co-Ordinated (0973) — May–June 2024, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which processes are examples of excretion? [Table: rows A-D each mark yes/no for whether 'release of energy from food' and 'release of oxygen from photosynthesis' are examples of…
Answer this question and get it marked →What are all living organisms made from? A cells B eggs C mesophyll D sperm
Answer this question and get it marked →Analysis of a large food molecule shows that it contains the elements carbon, hydrogen and oxygen only. Which food groups could this molecule be from? A carbohydrates and fats…
Answer this question and get it marked →The graph shows the mass of product produced by an enzyme-controlled reaction over time at 37 C and at 60 C (substrate and enzyme concentrations constant). The 60 C curve is…
Answer this question and get it marked →How many molecules of carbon dioxide are needed to produce six molecules of glucose? (6CO2 + 6H2O - C6H12O6 + 6O2 for one molecule of glucose) A 1 B 2 C 3 D 36
Answer this question and get it marked →A student investigates the effect of size of gelatine cubes on the rate of digestion by protease. An 8 cm3 cube of gelatine is placed into protease and the time to digest is…
Answer this question and get it marked →Which graph shows the effect of humidity on the rate of transpiration? [Graphs A-D: rate of transpiration vs humidity; C shows the rate decreasing as humidity increases.] A graph…
Answer this question and get it marked →A student places a mixture of yeast and glucose in a boiling tube, covers it with a layer of oil, and uses a delivery tube to bubble gas through limewater. After 10 minutes, the…
Answer this question and get it marked →A person touches a hot object and pulls their hand away. This is a reflex action. What is the pathway for the reflex action? A stimulus - motor neurone - relay neurone - sensory…
Answer this question and get it marked →The diagram shows the human male reproductive system with structures labelled X, Y and Z. [Diagram: male reproductive system; X = sperm duct, Y = prostate gland, Z = urethra.]…
Answer this question and get it marked →Which row about the nucleus of human cells is correct? A diploid, 23 chromosomes, gamete B diploid, 46 chromosomes, body cell C haploid, 23 chromosomes, body cell D haploid, 46…
Answer this question and get it marked →What is an ecosystem? A a chart showing the flow of energy from one organism to another B a diagram giving the energy level of an organism in its environment C a network of…
Answer this question and get it marked →Which line shows how the oxygen concentration of the water changes after excess fertiliser has entered a stream? [Graph: oxygen concentration vs distance downstream; line B dips…
Answer this question and get it marked →W, X, Y and Z are diagrams representing atoms and molecules (circles representing atoms; molecules contain joined circles). Which statement is correct? [Diagrams W, X, Y, Z:…
Answer this question and get it marked →Which row describes the properties of a covalent compound? A volatility high, electrical conductivity when molten none B volatility high, conductivity high C volatility low,…
Answer this question and get it marked →The equation for the reaction of sodium with water is 2Na(s) + 2H2O(l) - 2NaOH(aq) + H2(g). Which mass of sodium produces 30 cm3 of hydrogen? (Ar Na = 23; molar gas volume = 24…
Answer this question and get it marked →Aqueous copper(II) sulfate is electrolysed using carbon electrodes. What is the ionic half-equation for the reaction at the cathode? A Cu2+ + 2e- - Cu B 2H+ + 2e- - H2 C Cu - Cu2+…
Answer this question and get it marked →The energy level diagram for a reaction shows the products higher in energy than the reactants. [Energy level diagram: products above reactants.] The diagram represents an…
Answer this question and get it marked →In which equation is the underlined substance acting as an oxidising agent? (the underlined substance is shown in capitals/context) A AgNO3 + NaCl - AgCl + NaNO3 (AgNO3…
Answer this question and get it marked →Universal indicator solution is added to test-tubes W (dilute hydrochloric acid), X (aqueous sodium hydroxide) and Y (aqueous sodium chloride). [Diagram: three test-tubes W, X, Y…
Answer this question and get it marked →Copper is a transition element. Which row shows two properties of copper? A property 1 high melting point, property 2 forms coloured compounds B high melting point, forms white…
Answer this question and get it marked →Metal X reacts with aqueous metal Y2+ ions. The ionic equation is X + Y2+ - X2+ + Y. What are metals X and Y? A X copper, Y iron B X copper, Y zinc C X zinc, Y copper D X…
Answer this question and get it marked →Ammonia is displaced from its salts by reaction with substance Z. Which row identifies substance Z and the test for ammonia? A substance Z hydrochloric acid, test turns red litmus…
Answer this question and get it marked →Four equations are listed. 1 H2S2O7 + H2O - H2SO4 + SO3 + H2O 2 2S + 3O2 - 2SO3 3 H2SO4 + SO3 - H2S2O7 4 2SO2 + O2 - 2SO3 Which equations represent reactions that are involved in…
Answer this question and get it marked →Which substance is produced by the thermal decomposition of limestone? A calcium B calcium carbonate C calcium hydroxide D calcium oxide
Answer this question and get it marked →A gasoline fraction from the fractional distillation of petroleum includes compounds with the formulas C6H14 and C12H26. Which statements about these compounds are correct? 1…
Answer this question and get it marked →The molecule shown contains some amide linkages (-N(H)-C(=O)-). How many amide linkages are present in this molecule? [Diagram: a polypeptide chain with amide (peptide) linkages…
Answer this question and get it marked →A ball is moving at a speed of 3.0 m/s. The ball now accelerates with a constant acceleration of 2.0 m/s^2 in the direction that it is moving. What is the speed of the ball 5.0 s…
Answer this question and get it marked →What is meant by the moment of a force? A the speed of an object moved by a force B the time taken for a force to move an object C the turning effect of a force D the work done by…
Answer this question and get it marked →A paralympic athlete of mass 70 kg uses a wheelchair of mass 10 kg in a race. What is the kinetic energy of the athlete and wheelchair when they are moving at 6.0 m/s? A 240 J B…
Answer this question and get it marked →The table shows four sources of energy used to generate electricity. Which row about the energy source is correct? A coal, renewable yes, reliable at all times no B nuclear…
Answer this question and get it marked →Which region of the electromagnetic spectrum is often involved in heat transfer by radiation? A infrared B radio C ultraviolet D X-rays
Answer this question and get it marked →The diagram shows the direction of a wave that passes a particle. The particle is made to vibrate by the wave, with the direction of vibration perpendicular to the direction of…
Answer this question and get it marked →A plane mirror is fixed to a vertical wall and forms an image of an object. What are the characteristics of the image? A enlarged and upright B enlarged and inverted C same size…
Answer this question and get it marked →The diagram shows two soft-iron rods JK and LM placed between the poles of two magnets (N pole on the far left, S pole on the far right). Which row shows the poles induced in the…
Answer this question and get it marked →The graph shows how the resistance of a thermistor changes with temperature (resistance / kohm falling from 6.0 as temperature rises). There is a potential difference of 6.0 V…
Answer this question and get it marked →A kettle is connected to a 230 V mains supply. The current in the kettle is 10 A. How much energy is transferred in 3.0 minutes? A 12.8 J B 767 J C 6900 J D 414 000 J
Answer this question and get it marked →What is the function of a fuse in a circuit? A It decreases the resistance of the circuit. B It ensures a constant current in the circuit. C It ensures a constant resistance in…
Answer this question and get it marked →What is the purpose of the commutator in a direct current (d.c.) motor? A It reverses the direction of the current in the coil every half turn. B It reverses the direction of…
Answer this question and get it marked →A uranium nucleus decays by emitting an alpha-particle. The nuclide equation shows this decay: X/92 U - 234/Y Th + alpha-particle. What are the numbers X and Y? A X 234, Y 90 B X…
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